Canon 7d built in wireless flash control help

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Mark
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Hi all

I'm trying to sort out my wireless flash settings. It seems that, no matter what mode I set wireless to work with, The built in flash still fires a significant light that effects exposure.

The only way to prevent it is to literally block the light with my hand, which obviously isn't always practical.

Any ideas?
 
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The built in Flash only fires a Pre flash, to trigger and send the ttl readings to the remote flash unless asked not to, have you set it to fire the off camera flash only there is normally 3 setting, one for both, one for just remote, and one to adjust the flash ratio.
 
Well after reading the manual, I'm absolutely 100% setting it to the external flash only setting. I have no options for exposure comp on the internal, only external, yet the internal still fires as part of the exposure, it seems. If I block the internal from lighting the image, it comes out under exposed.
 
blocking the internal will maybe not sent the correct data to the remote flash. not sure though.
On the 60D there are 3 settings so not sure if quite the same on the 7D, i know the 600D is a bit more advanced than on the 60D for the wireless settings as we have one as well.
60d shows from top to bottom. 1 both. 2 just external. 3 external +internal.
With all 3 you get different results with the same manual setting.
If the same on the 7D i would test each setting and see if your getting different results. don't change any exposure settings, or exp comp on the flash and see if this shows any change in what your getting by reviewing the images.
 
I had the same issue which was discussed at length here

As said above, the pre-flash is what you are seeing, but it should only affect close or macro type shots as when the flash fires its at a low power setting - the simple answer is to either put some slide film or 'Quality Street' sweet wrappers over the pop up flash or you could modify as I did a Nikon :lol:SG-3IR IR Panel to fit the hot shoe making sure the micro-switch is not affected.
 
I cannot understand why the pop up flash is effecting the end result photo, it is designed not to effect the photos and fires slightly previous to the image being taken.

Just because the pop up flash fires doesn't mean it will effect the image, are you sure you have set flash on ETTL and are you sure its not camera setting that are wrong and effecting the finished photo.

could you post an example with exif in tact

I use 7D with a Canon 430 mk2 using flash off camera without any issues

Daz
 
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